Sandwich Structures

Vinson, Jack R.

doi:10.1115/1.3097295

Cited by 295 publications

(130 citation statements)

References 67 publications

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“…(Liaw Boen Dar, 1965, Balken et al 2010. Some advantages of sandwich plates are (Allen, 1969;Vinson, 2001;Raville, 1955):…”

Section: Mechanical Engineering: Dynamics and Strength Of Machinesmentioning

confidence: 99%

Galerkin–Vlasov Method for Deflection Analysis of Isotropic Sandwich Plates under Uniform Load

Mama¹,

Ike²

2018

JES

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Abstract. In this work, the Galerkin-Vlasov method was used to solve the governing partial differential equation of equilibrium for isotropic sandwich plates with simply supported edges (x = a, y = b) and under uniform load on the plate domain ( , ).Vlasov procedure was adopted in choosing the displacement shape functions as orthogonal eigen functions of dynamic Euler Bernoulli beams with equivalent spans, simple supports and loading as the plate. The resulting Galerkin-Vlasov equation was solved to obtain the unknown generalised shape function. It was found that the deflections obtained were exact solutions to the problem of bending isotropic sandwich plates. The deflection was found to be made up of two components: flexural deformation and shear deformation.

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“…(Liaw Boen Dar, 1965, Balken et al 2010. Some advantages of sandwich plates are (Allen, 1969;Vinson, 2001;Raville, 1955):…”

Section: Mechanical Engineering: Dynamics and Strength Of Machinesmentioning

confidence: 99%

Galerkin–Vlasov Method for Deflection Analysis of Isotropic Sandwich Plates under Uniform Load

Mama¹,

Ike²

2018

JES

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“…Two decades later, Plantema (1966) and Allen (1969) elaborated first monographs devoted to bending, buckling and design problems of sandwich beams, plates and shells. Noor et al (1996), Vinson (2001), Carrera (2003), Carrera and Brischetto (2009) presented a review of the problems related to computational models, applications and analysis of sandwich structures. Kazemahvazi and Zenkert (2009) developed an analytical model for the compressive and shear response of monolithic and hierarchical corrugated composite cores.…”

Section: Introductionmentioning

confidence: 99%

Strength of a metal seven-layer rectangular plate with trapezoidal corrugated cores

Magnucka‐Blandzi

Walczak

Wittenbeck

et al. 2017

jtam

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The subject of analytical and numerical investigations in this paper is a metal seven-layer rectangular plate with a trapezoidal corrugated main core and two trapezoidal corrugated cores of faces. The hypothesis of deformation of the normal to the middle surface of the plate after bending and field of displacements is formulated. The plate is simply supported on all its edges and subjected to a uniform pressure. Equations of equilibrium are derived based on the theorem of minimum total potential energy and are solved with the use of the Galerkin method. The influence of the trapezoidal corrugation pitch of the cores on the deflection and the equivalent stress is analysed.

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“…The single-layer shells are considered in [6,7], whereas the bi-layered in [9] and sandwich ones in [9÷13]. Works [3,4] present different approaches and methods of sandwich structures analysis and the authors give large reference lists there. The empirical results of buckling analysis of thin-walled conical shells under external pressure are presented in [7].…”

Section: Introductionmentioning

confidence: 99%

The stability of the sandwich conical shell panel - the stress state analysis

Tertel

Kuryło

2017

Teh. vjesn.

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Original scientific paper The paper presents an analysis of the stress state in a sandwich open conical shell panel. The shells under consideration consist of two face-layers (facings, claddings) and a core layer. The facings are load-carrying, a core layer is lightweight and it resists transverse shear only. The facings are made of isotropic, compressible, work-hardening materials. The core is the greater part of the whole shell thickness (over 80 %). The shell under consideration is two-parametrical loaded. Pre-buckling deformation of the shell could occur within the elastic, elastic-plastic or plastic range. In order to determine the stress state which occurs during stability loss, the constitutive relations of the Nadai-Hencky deformation (NHd) theory, alongside the HMH (HuberMises-Hencky) yield condition, are accepted. The results obtained from the analysis show that during stability loss, the effective stress may temporarily decrease. Then the unloading and hardening phenomena could occur and this should be taken into consideration. Keywords: buckling; deformation; sandwich shell; stability; stress Stabilnost konusne panel oplate slojevite konstrukcije -analiza stanja naprezanjaIzvorni znanstveni članak U radu se daje analiza stanja naprezanja konusne panel oplate slojevite konstrukcije. Analizirana oplata sastavljena je od dva vanjska sloja (obloge) i srednjeg sloja. Obloge podnose opterećenje, srednji sloj je male težine i odupire se samo poprečnom smiku. Obloge su od izotropnih, stlačivih materijala za otvrdnjivanje zbog obrade. Središnji sloj zauzima veći dio debljine čitave oplate (preko 80 %). Razmatrana oplata je dvo-parametarski opterećena. Do deformacije pred-izvijanja oplate može doći u okviru elastičnog, elastično-plastičnog ili plastičnog područja. Kako bi se odredilo stanje naprezanja do kojeg dolazi tijekom gubitka stabilnosti, prihvaćeni su konstitutivni odnosi Nadai-Hencky teorije deformacije uz Huber-Mises-Hencky(HMH) uvjet popuštanja. Dobiveni rezultati pokazuju da tijekom gubitka stabilnosti može doći do privremenog smanjenja efektivnog naprezanja. Tada može doći do pojave rasterećenja i kaljenja i treba ju uzeti u obzir.

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Sandwich Structures

Cited by 295 publications

References 67 publications

Galerkin–Vlasov Method for Deflection Analysis of Isotropic Sandwich Plates under Uniform Load

Galerkin–Vlasov Method for Deflection Analysis of Isotropic Sandwich Plates under Uniform Load

Strength of a metal seven-layer rectangular plate with trapezoidal corrugated cores

The stability of the sandwich conical shell panel - the stress state analysis

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